Stock exhaust diameter question

[philbar71]

I know it is 2.25" but is that I.D or O.D?

[Brians00Blackbird]

Re: Stock exhaust diameter question

It's 2.25 through, why are you asking that would help to answer your question

[philbar71]

Re: Stock exhaust diameter question

I got a 3" over the axle pipe and Dynomax super turbo and I was thinking of clamping the over the axle pipe to the stock exhaust and I couldnt figure out if it was 2.25 I.D or O.D. But Im just going to have an exhaust shop weld it together for me.

[Brians00Blackbird]

Re: Stock exhaust diameter question

If I were you I'd go 3' from the cat to the tips, the transition from 2.25 to 3 is a big difference when it comes to flow so I'd recommend going 3 all the way

[ScottS4050]

Re: Stock exhaust diameter question

If I were you I'd go 3' from the cat to the tips, the transition from 2.25 to 3 is a big difference when it comes to flow so I'd recommend going 3 all the way

That's what I did, except it is 2.5" from the muffler to the dual tips. 3" from the cat (including both sides of the cat) to the muffler.

[ssms5411]

Re: Stock exhaust diameter question

If you were to get headers you can go 2.5" from the headers to a 3" Y pipe then 3" all the way back.